examples/lcd.py

   1 #!/usr/bin/env python
   2
   3 import ST7735
   4 from PIL import Image, ImageDraw, ImageFont
   5 import logging
   6
   7 logging.basicConfig(
   8     format='%(asctime)s.%(msecs)03d %(levelname)-8s %(message)s',
   9     level=logging.INFO,
  10     datefmt='%Y-%m-%d %H:%M:%S')
  11
  12 logging.info("""lcd.py - Hello, World! example on the 0.96" LCD.
  13
  14 Press Ctrl+C to exit!
  15
  16 """)
  17
  18 # Create LCD class instance.
  19 disp = ST7735.ST7735(
  20     port=0,
  21     cs=1,
  22     dc=9,
  23     backlight=12,
  24     rotation=270,
  25     spi_speed_hz=10000000
  26 )
  27
  28 # Initialize display.
  29 disp.begin()
  30
  31 # Width and height to calculate text position.
  32 WIDTH = disp.width
  33 HEIGHT = disp.height
  34
  35 # New canvas to draw on.
  36 img = Image.new('RGB', (WIDTH, HEIGHT), color=(0, 0, 0))
  37 draw = ImageDraw.Draw(img)
  38
  39 # Text settings.
  40 font_size = 25
  41 font = ImageFont.truetype("fonts/Asap/Asap-Bold.ttf", font_size)
  42 text_colour = (255, 255, 255)
  43 back_colour = (0, 170, 170)
  44
  45 message = "Hello, World!"
  46 size_x, size_y = draw.textsize(message, font)
  47
  48 # Calculate text position
  49 x = (WIDTH - size_x) / 2
  50 y = (HEIGHT / 2) - (size_y / 2)
  51
  52 # Draw background rectangle and write text.
  53 draw.rectangle((0, 0, 160, 80), back_colour)
  54 draw.text((x, y), message, font=font, fill=text_colour)
  55 disp.display(img)
  56
  57 # Keep running.
  58 try:
  59     while True:
  60         pass
  61
  62 # Turn off backlight on control-c
  63 except KeyboardInterrupt:
  64     disp.set_backlight(0)